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Does Everyone Have Sesamoid Bones?

Maya Lin-Takahashi • • 7 min read
Does Everyone Have Sesamoid Bones?

Most people have five sesamoid bones in each hand. Two at the thumb metacarpophalangeal joint

metacarpophalangeal joint
Introduction. The metacarpophalangeal (MCP) joints are diarthrodial joints where the large convex heads of the distal aspect of the metacarpals articulate with the concave-shaped proximal aspect of each phalange. The articulating surface of each metacarpal head and proximal phalange is composed of hyaline cartilage.
, one at the interphalangeal joint of the thumb, one at the metacarpophalangeal joint of the index finger on the radial side, and one at the metacarpophalangeal joint of the little finger on the ulnar side.

Does everyone have sesamoid bones in their foot?

The foot is comprised of 28 bones. Two of them are what are called 'sesamoids. ' These bones are named for their shape, which resembles a sesame seed. Everyone has two of these bones in each foot and sometimes one or both can naturally occur in two pieces (called bipartite).

Are sesamoid bones common?

Introduction. The term sesamoid is used for certain small nodular foci composed of bone, cartilage, or both that are shaped like a sesame seed1. Sesamoid bones are common in humans, and vary in number. As many as 42 sesamoid bones can be found within a single person2.

Maya Lin-Takahashi
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Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.